韩学辉^1,,
聂俊光^2,,,
郭俊鑫³,
毛新军⁴,
罗兴平⁵,
王振林⁵,
张浩⁴,
刘红林⁶,
王洪亮⁷,
江佳洋¹,
李昊¹,
李靖¹
1. 中国石油大学(华东)地球科学与技术学院, 青岛 266580
2. 同济大学海洋与地球科学学院, 上海 200092
3. 南方科技大学, 深圳 518055
4. 中国石油股份有限公司新疆油田公司勘探事业部, 克拉玛依 834000
5. 新疆油田公司勘探开发研究院, 克拉玛依 834000
6. 新疆油田公司采油二厂, 克拉玛依 834000
7. 中国石油西部钻探工程有限公司, 乌鲁木齐 830011

基金项目: 国家自然基金（U1562108）、国家科技重大专项（2017ZX05009001）和"十三五"专项（2016ZX05011）联合资助


详细信息

作者简介: 韩学辉, 男, 1974年生, 辽宁盘锦人, 博士, 副教授, 主要研究方向为岩石物理.E-mail:hanxuehui@upc.edu.cn

通讯作者: 聂俊光, 男, 山东东营人, 同济大学海洋与地球科学学院博士研究生在读, 主要研究方向为岩石物理.E-mail:njg@tongji.edu.cn

中图分类号: P631

收稿日期:2019-07-12
修回日期:2019-12-23
上线日期:2020-04-05

Quantitative estimation of contact cemented clay in clayey sandstone and its effect on elastic properties of sandstone

HAN XueHui^1,,
NIE JunGuang^2,,,
GUO JunXin³,
MAO XinJun⁴,
LUO XingPing⁵,
WANG ZhenLin⁵,
ZHANG Hao⁴,
LIU HongLin⁶,
WANG HongLiang⁷,
JIANG JiaYang¹,
LI Hao¹,
LI Jing¹
1. School of Geoscience, China University of Petroleum(East China), Qingdao 266580, China
2. School of Ocean and Earth Science, Tongji University, Shanghai 200092, China
3. Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen 518055, China
4. Exploration Department of Xinjiang Oilfield Company, PetroChina, Karamy 834000, China
5. Research Institute of Petroleum Exploration and Development, Xinjiang Oilfield Company, PetroChina, Kalamay 834000, China
6. The Second Oil Production Plant, Xinjiang Oilfield Company, PetroChina, Kalamay 834000, China
7. CNPC West Drilling Engineering Company Limited, Vrümqi 830011, China


More Information

Corresponding author: NIE JunGuang,E-mail:njg@tongji.edu.cn

MSC: P631

--> Received Date: 12 July 2019
Revised Date: 23 December 2019
Available Online: 05 April 2020


摘要
摘要:在泥质砂岩的岩石物理建模中，明确泥质砂岩中泥质胶结物的接触类型及其含量对正确认识泥质的胶结作用对泥质砂岩声速的影响以及合理地建立岩石物理模型至关重要.现阶段，尚未有实验室定量估算胶结泥质的方法，导致应用胶结砂岩理论模型预测胶结砂岩地层的声速时往往由于胶结物含量被高估从而导致预测声速结果偏高.本文通过观察铸体薄片中泥质与颗粒之间的接触关系和相对分布提出了一种区分胶结泥质和分散泥质的方法：与两个或两个以上颗粒接触的连续分布的泥质为胶结泥质；与一个颗粒接触或者不与颗粒接触的泥质为分散泥质.基于这一准则，本文基于像素拾取法估算了人造泥质砂岩的胶结泥质含量，并将胶结泥质含量作为胶结砂岩模型的输入参数优化CCT模型.对比原始模型，本文方法声速误差下降了20%，预测准确度显著提高.本文方法适用于弱胶结地层的岩石物理建模，能够准确的预测声速以结合地震和测井资料识别有利储层，定量评价储层参数.
关键词: 分散泥质/
胶结泥质/
胶结砂岩模型/
岩石物理模型/
泥质砂岩

Abstract:When building the rock physics model for clayey sandstones,it is of critical importance to clarify the contact type and content of cement clay in clayey sandstone for correct understanding of the influence of the cementation on acoustic velocity of clayey sandstone and how to reasonably establish the rock physical model. At present,there is no laboratory method to directly and quantitatively estimate the content of the cement clay,leading to large errors in predicting acoustic velocity when using the cemented sands model for cemented sands formation because of the over-estimated cement clay. In this paper,a method for distinguishing cemented clay is proposed by observing the contact relationship and relative distribution between clay and particles in thin sections. By this approach,the clay distributed at the contact area of the contact particles which connect two or more particles is regarded as the cement clay,while the clay present around only one particle or distributed in the pore space is treated as the dispersed clay. Based on this criterion,the content of the cement clay of a batch of artificial clayey sandstones is estimated quantitatively by a pixel pickup method,and the cement clay is used as the input parameter of the cement sand model to optimize the CCT model. The comparison shows the velocities error predicted in our method is 20% lower than the original model,and the predicted results are significantly improved. The method proposed in this paper is a suitable rock physics model for weak cemented formation. It can predict acoustic velocity to identify favorable reservoirs and quantitatively evaluate reservoir parameters by combining seismic and logging data.
Key words:Dispersed clay/
Cement clay/
Cement sand model/
Rock physics model/
Clayey sandstone



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